Im willing to bet they made use of the meat, but that picture would never mention that, now would they?
I wouldn't, I might get my suede boots muddy....I would gladly hunt an animal for fur or fashion. People need to grow the eff up.
Or mathematically, the area of a square is the square of any side or S^2; 1^2=1, in this case.
The area of a circle is pi x radius, squared. The radius is 0.5. Squared, that's 0.25. Multiplied by pi, that's 0.785.
If the area of the square was equal to the area of the circle, those numbers would be equal.
Actually, the moment the first corners were inverted, it was no longer a square. (so the method for calculating area becomes that of a polygon).
The inside area will constantly change (reduced) as each line is broken into a smaller lines (always perpendicular).
The point of it is that you can approximate (VERY closely) the perimeter of what will be a "near circle" to be 4.
Just imagine a pixelated circle. As long as it remains 90 degree angles, the perimeter will be 4. (even if the lines become so short that it looks like an aliased circle).
And as that happens, its area will become that of the circle (that is to say, you can take this out to 10^20 decimal places of precision..and it still won't be EXACTLY the same---but right above it).
The circle is the moment you intersect those 90 degree vectors with one continuous line.
Please keep in mind that you are supposed to continually reduce the line segments to near infinity.
If you do, it truly does look like a circle and takes on the same area.